I don't know if I'm looking for it right but no matter how hard I look for the salt mineral I can't find it. In the guidebook it appears that this material appears in the river biome but I am not able to see it anywhere. I'm using in the 1.16.5 versión. I know it's not common to find it, but how can I make your search easier?

There is not any way for me to make it any more common, you just have to run along biomes that are marked as minecraft:river or minecraft:ice_river. that or update to versions 1.4.1 on either forge or fabric. Those versions have salt that spawns nearly as commonly as clay.

I was using the 1.4.0 version, i downloaded 1.4.1 and finally i could see salt. Thanks for the help